Coiled tubing wellbore cleanout
CA 2637304 C · Owner: Walker, Scott A. · Inventors: Walker, Scott A.; Wilde, Graham B.; Li, Jeff
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method and apparatus for substantially cleaning fill from a borehole. The apparatus includes a nozzle attachable to coiled tubing having at least one high energy jet directed downhole; at least one low energy jet directed uphole; and means for switching in the nozzle fluid flow from the coiled tubing from the at least one high energy jet to the at least one low energy jet.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed April 24, 2001 and granted August 14, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.